<a href="https://www.greenlifestylemag.com.au/blogs/julie#">Green challenges</a>

Green challenges

Thinking global and acting local, Julie Grundy takes on any challenge we throw at her.

Fishy business

3 tuna fish

Credit: U.S. National Oceanic and Atmospheric Administration

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Over 75 per cent of the world's fisheries are overfished, with more of them nearing collapse all the time.

This means there aren't enough fish to support a viable population, which is a huge loss to biodiversity in our oceans. Some of the fish affected are barramundi, bluefin tuna, salmon, and shark - all of which you can buy anytime you like.

Another environmental impact is that industrial methods of fishing can be really destructive to the ocean and to other marine animals. Sea-floor trawling and sea-cage aquaculture can destroy natural habitats and affect threatened species like dolphins.

Of course, there are better methods: tank aquaculture doesn't affect ocean eco-systems, and dive fishing and landline fishing are much lower in impact than other methods. You can learn more in this G story and at the Australian Marine Conservation Society's website, along with how to make better choices if you are eating fish.

Some vegetarians will make an exception and eat fish, for health reasons. Then they're called 'pescetarians' instead. Other vegetarians find that overfishing or ethical reasons are too serious a problem, and stick to eating only foods that "don't have a face".

As with all issues to do with what we eat, this is a personal decision that everyone has to work out for themselves.

My own stance during this challenge is that fish is off my menu for the whole month. After the challenge is over, I'm not sure I'll go back to eating a lot of fish, because it's very hard to find sustainable sources.

I've got a copy of the AMCS's Sustainable Seafood Guide, but I'm finding that supermarkets and fishmongers keep using vague labels so it's hard for me to tell what I'm buying.

And no one labels how they catch the fish, so I can't avoid anything from sea-floor trawling and other destructive methods.

What are your thoughts on this issue? Do you think we need better labelling so that consumers can make an informed decision? Or perhaps we need better regulation of the fishing industries?